Accreditation as test laboratory according to DIN EN ISO/IEC 17025
We are a DAkkS accredited testing laboratory for DIN EN ISO/IEC 17025 (General Requirements for the Competence of Testing and Calibration Laboratories):
- determination of emissions and immissionsof sounds,
- the assessment of speech intelligibility,
- Building acoustics and
- the Immission Control module (country specific).

The accreditation is registered under the number D-PL-20822-01-00 and applies to the procedures listed in the accreditation certificate.
Notified body
We have been notified by the State of Berlin as an expert body in accordance with § 29b of the Federal Immission Control Act (BImSchG) in conjunction with the Ordinance on the Notification of Immissions (41. BImSchV) for the activities referred to in paragraph V.
A publication of the announcement can be viewed via the RESYMESA research system of measuring points and experts.
Quality Management
Akustikbüro K5 GmbH operates a quality management system. This is a prerequisite for accreditation according to DIN EN ISO/IEC 17025 as a testing laboratory – we live the system in daily operation and use it for improvement and error prevention.
Publicly appointed expert for room acoustics
Tobias Kirchner is a publicly appointed and sworn expert for room acoustics by the Berlin Chamber of Industry and Commerce. Link to the entry of the IHK: to the nationwide expert directory.
Memberships & Standards Committees
Tobias Kirchner is a member of DEGA as well as a member of the DIN and VDI standards committee for acoustics, noise reduction and vibration technology (subcommittee NA 001-02-03-03 UA for the revision of DIN 18041).
Jakob Kraft is a member of DEGA’s standards committee “Voice Alarm Systems and Electroacoustic Emergency Warning Systems” (DKE/AK 713.1.17). In this committee the DIN VDE 0833-4 is supervised among other standards.